Tag: encyclopaedia

Posted in Psychology & Medicine

Hiccup

Posted on by Jinavie

A hiccup is a common phenomenon that almost everyone experiences some time in life. The exact mechanisms are still not well known, but it is likely caused by an irritation of the phrenic nerve, which supplies the diaphragm, causing it to spasm and interrupt normal breathing.

This can be a very debilitating condition, and such there are hundreds of “remedies”, such as drinking cold water, holding your breath or giving the person a scare. However, these are often ineffective in taking away the ailment. 

One thing you can try is pulling your tongue. Although it may sound like a crazy treatment, it stimulates the vagus nerve which can stop a hiccup. However, note that this may be ineffective in many cases as well.

In some cultures, it is said that hiccups are brought on by eating something one stole off another person, or if others are talking about you in a bad manner.
The world record for the longest attack of hiccups is held by Charles Osborne, who had it for 68 years.

Posted in Philosophy

Occam’s Razor

Posted on by Jinavie

Occam’s razor is a philosophical concept that dictates that all other things being equal, the simplest solution is the best. It is useful in many situations, especially the sciences, where it allows one to find an answer without being distracted by the numerous variables.

In medicine, Occam’s razor is extremely useful in differential diagnosis where a doctor may easily prioritise the possible diagnoses and save precious time. Dr Greg House in House MD shows demonstrates just this.

In physics, models showing movement of objects for calculation of force required ignores real factors such as friction or centrifugal force to simplify the situation, showing only the forces being observed. This type of modelling is used in many subjects, where only factors being observed are taken into consideration to find a correlation, or some form of desired truth. 

Although some may suggest that this method does not give the “truth” as vital information may be cut out in the process, it can also be argued that one cannot see the truth unless the “distractions” are removed. This is the fundamental basis of the Occam’s razor, where complexities are “shaved” away until truth is left. A quote by the musician Daniel Jacobs, “The truth of simplicity is camouflaged by the complexity of lies just as a tangle of lies will mask the simplicity of truth,” also supports this idea.

Posted in Science & Nature

Fibonacci Number

Posted on by Jinavie

1 1 2 3 5 8 13 21 34 55…

A keen observer would note that each number in the above sequence is the sum of the two numbers before it. These are known as Fibonacci numbers and are among the most famous number sequences in mathematics.

It is famous because of some unique properties. For example, every third number is even, every xth number is the multiple of Fx (e.g. 4th number = 3, 8th number = 21…) and the list goes on. It is also known to approximate golden spirals, a mathematical function that is closely related with yet another famous number: the golden ratio.

However, a more interesting (and more relatable) fact about these numbers is that they appear repeatedly in nature. It has been noted for many centuries that plants tend to follow the Fibonacci sequence in various ways. This includes the number of branches of trees that grow per year, the number of petals on a flower (almost all flowers have a Fibonacci number of petals) and most interesting of all: the arrangement of florets on the face of a sunflower. If one carefully scrutinises the face of a sunflower (also applies to pine cones), they will note that the florets (tiny pieces on the face) are arranged in what appears to be spirals. They are actually arranged on a stack of spirals, both clockwise and anti-clockwise. The number of spirals for both directions are always two Fibonacci numbers next to each other (e.g. 34 and 55).

This is because natural selection pushes the plants to arrange their florets, petals and tree branches in the most efficient manner possible, which is provided by the Fibonacci sequence.

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Posted in History & Literature

Cassandra

Posted on by Jinavie

Cassandra is a woman featuring in Greek mythology, who is blessed by Apollo the gift of foretelling. However, when she does not return his love he curses her to be never believed by others. This causes her the eternal suffering of seeing the future yet being completely helpless as no one will believe her clairvoyance.

This theme has been portrayed in many works, such as Twelve Monkeys where it is shown how someone who knows the future will most likely be treated as a lunatic in society. Because society has a tendency to treat anyone different to the norm as “abnormal” and therefore inferior, it is easy for a society to reject such a gift.

Posted in Science & Nature

Parthenogenesis

Posted on by Jinavie

It is often believed that for complex organisms such as animals, sexual reproduction is a must to produce offspring. Asexual reproduction is common in bacteria and (some) plants, but even tiny beings such as insects use sexual reproduction to produce a mass of variable offspring. 

However, it has been found that despite having two clear sexes – male and female – there are cases where a certain species is able to reproduce without the need of sexual intercourse. In these cases, the female’s eggs spontaneously divides to form a new offspring without being fertilised by a sperm. Furthermore, sometimes the egg either fuses with another egg or undergo several genetic mixing and mutation to produce some variety in genetic pool, thus avoiding the issue of asexual reproduction (where the entire population can be wiped out by a single disease due to identical genetic makeup). This is known as parthenogenesis, and it has been documented in many insects, fish, reptiles and even birds. 

Obviously, as there is no donation of a Y chromosome, every offspring born from parthenogenesis is female. Because of this, some species such as the New Mexico whiptail, a lizard that is capable of both sexual reproduction and parthenogenesis, the population has completely rid itself of males, making it a completely female species. Curiously, they still engage in “mock sex”, giving them the nickname “lesbian lizards”.

Although parthenogenesis has never been documented in mammals in nature, it has been induced artificially in mice, rabbits and monkeys. However, they all developed severe developmental issues due to the numerous mutations in the egg required for parthenogenesis. 
But if in the future, human parthenogenesis is perfected, it is possible that humanity too could end up as an all-female society.

Posted in Psychology & Medicine

Morality

Posted on by Jinavie

People tend to believe that morality is an absolute concept, or that people cannot easily be “turned” away from their values. However, many interesting experiments have proved that our morality may be more easily manipulated than previously thought.

It has been shown that various factors affect our decision making processes. For example, when a subject is near a drawing of an eye, such as a poster, they tend to be more honest and less likely to cheat in an exam. The opposite effect is seen when there is dim lighting, even if it is only slightly dimmer (as in not dark). This can be explained by our subconscious wanting to be moral when seen by others, while acting much more freely when it believes we are hidden (the classic example being babies believing that if they do not see it, it does not exist). Not only are there obvious examples like this, but there are also strange factors such as large trees lowering crime rates, while examples of bad behaviour (such as graffiti or broken windows) elicit bad behaviour on the observer as well. 

The relationship between religion and morality has also been a time-old philosophical question. It has been shown that anything that invokes the image of a deity brings out generous, good behaviour in people, as it plays to the fear element (that someone is always watching and will bring consequences) in the mind. However, there have also been cases such as a police strike in a Canadian town causing mass lootings and a significant spike in crime rates despite the strong religious background of all the people. It is also notable that Hitler and Stalin were both strong Christians, yet their actions are still considered some of the most evil acts in history.

Therefore, it is entirely possible that morality is a learned behaviour that only exists for an effective society, meaning that it can also be twisted by many different factors.

Posted in Science & Nature

Star Wars

Posted on by Jinavie

Star Wars is packed to the brim with epic scenes of starship dogfights. The many “pewpews” of laser cannons and massive explosions characterise this classic science fiction film series. However, this is an example of a classic “unscientific fiction”.

The great explosions of ships would never generate a loud sound as in space, there is no air or any medium to carry the sound waves. As the tagline for the movie Alien states: nobody can hear you scream in space.
In this regard, 2001: A Space Odyssey is most accurate in its portrayal of space. Not only does it have absolute silence during its scenes outside in space, but it also has accurate portrayals of space-science such as magnetic boots and rotating toilets to generate gravity.

Posted in Psychology & Medicine

Vertex

Posted on by Jinavie

The vertex, also known as the crown of the head, is the uppermost point on the human body on the top of the head. It is the part of the body that comes out first (usually) during childbirth.

There are some interesting properties regarding this anatomic location.

Firstly, if one places a cellphone on top of their head, they cannot feel the vibration when they receive a call or text message. Almost every other part of the body can feel the vibration, but not the vertex. This is because the top of the skull is not covered by any muscles, which have receptors that sense vibrations. Ergo, no vibrations can be felt.

Secondly, when one places their hand on top of their head, they experience a sudden drop in muscle strength. This applies to the whole body and can be seen through basic activities such as lifting weights or even through arm-wrestling. The degree of weakness can be up to 10~15% of the muscle’s normal strength. 

The reason for this is slightly more complicated. The nervous system remembers trauma and responds to it, such as childbirth where almost everyone (assuming they were born through vertex presentation, the most common) experiences trauma on the top of the head. For example, as labour is quite an intensive procedure, significant pressure is placed on top of the baby’s head as it tries to push out.
Because of this, when pressure or electric signals are exerted on the vertex, the nervous system responds negatively, remembering the trauma from childbirth, and “weakens” throughout the body. This results in decreased force exertion by muscles. The same effect can be achieved when a cellphone is placed on top of the head, as it emits electric signals.

Lastly, the top of the head is not sealed until a few months after birth. This makes a baby’s skull very malleable, and two fontanels, which are gaps between pieces of the skull, remain open for that time. This is seen as “soft spots” on the head which pulsates as there is no bone beneath it.

Posted in History & Literature

Computer Bug

Posted on by Jinavie

The first-ever recorded computer bug occurred in 1947, on a US Navy Mark II Aiken Relay Calculator at Harvard University. After a thorough check of the computer’s software and components, operators discovered a moth that had fried itself on the circuit board, interfering with signals. 
The operators taped the said moth to a computer log, with the description “First actual case of bug being found”, and also added the comment that they had “debugged the computer”, coining both the terms “bug” and “debug” that are frequently used nowadays.

Although actual insects are a rare cause of problems in modern computers, the word “bug” is still the colloquial term for an error. 

Posted in Science & Nature

Peppered Moth

Posted on by Jinavie

The peppered moth are a species of night-flying moth that have been studied extensively for over 200 years by biologists. They are known to be prime examples of the power of natural selection.

In England, there are two variants of this moth: one that has a peppery white appearance and another that is much darker, almost black. Originally, the white variant was much more common, as they could easily camouflage themselves on trees covered in light-coloured lichen.

However, during the Industrial Revolution, the heavy pollution killed the sensitive lichen causing trees to expose their dark bark. This caused the white moth to be extremely visible, making them easy prey for birds and other predators. The change in environment resulted in black moths, that used to be disadvantaged, to have a better chance of survival, causing the black moth population to become superior.

As people became more aware of air pollution and England began cleaning up its environment, lichen returned to the tree and the table turned once more – the dark moths were now better targets and were heavily preyed on. Instead, the white moth retook the majority position, thus showing how the environment affects which traits survive in a population.